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Model "looks" solid but Sketchup says otherwise?

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  • P Offline
    Panic Button
    last edited by 24 Jan 2011, 18:56

    Hello there!

    I'm a bit new to Sketchup, however I have been toying around with it.

    My question is that my model "looks solid" , however when I try to use the Solid tools (such as Intersect, Trim, etc), it says it cannot be done as one of the things I'm trying to intersect it with is not a solid. It also does not tell me the volume.

    I have used the Solid Inspector tool, and see red/yellow lines, yet deleting the red and yellow lines ruins the model.

    I will use the finished model with Ponoko for 3D printing, hence the need for it to be "solid".

    Any help? 😄

    The model I have made is attached to this post. But, please ignore the small little shape (that one DOES have a volume, however.)


    Panic Button Model.skp

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    • T Offline
      TIG Moderator
      last edited by 24 Jan 2011, 20:21

      Your model is 'quite small' with may small facets...
      Both SUp and OpenGL have a limitation on very small [and very large] facet sizes.
      They can 'exist' when scaled down later... BUT they cannot be 'made' initially.
      Anything with a side <~0.1mm will fail.
      I suspect that that the form you made has a tiny hole in it, so it's not reported as solid!
      Try remaking it x10 or x100 bigger and then scaling it down to suit - hopefully, it will then keep its facets and be regarded as 'solid'............

      TIG

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      • D Offline
        Dave R
        last edited by 25 Jan 2011, 11:40

        I had a look at your model. In this case I think the problem lies with the edge between the rim structure and the body. See in the green rectangle. If you pull the large flat face back a few mm, I think you'll find it becomes solid. You'll have to delete some interior faces that will be created around that rim, too.


        http://farm6.static.flickr.com/5215/5386765195_4354b75837_z.jpg

        Of course this thing wouldn't work in reality as currently drawn. That rim wouldn't be attached to the rest.

        Etaoin Shrdlu

        %

        (THERE'S NO PLACE LIKE)

        G28 X0.0 Y0.0 Z0.0

        M30

        %

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        • T Offline
          TIG Moderator
          last edited by 25 Jan 2011, 12:05

          Dave is right.
          Volumes meeting at a common edge are not regarded as 'solid'.Capture1.PNG
          Volumes that are separate are 'solid'.Capture2.PNG
          Volumes that overlap and share a common 'internal' face are not regarded as 'solid'.Capture3.PNG
          Volumes that overlap but have no internal faces [here they were removed] are 'solid'.Capture4.PNG

          TIG

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